I got it from the App Store. After I played Real Myst on my iPad I went searching for more Microid games and found Riven. I haven't finished it yet, but so far it been going great. I'm about to get into the submarine and travel around the underwater maze.

I'm puzzled now. I just did a search on my iPad in the App Store and couldn' find Riven listed under Microid - I did find it under Cyan games. I checked my list of purchases from the App Store and it's not listed. I don't know what version I have, but it sure there on my iPad.

BTW, there are a LOT of great games listed for the iPad from Cyan and Microid : Draculas, a couple of the Atlantis games, Mysterious Island, The Messenger,and quite a few more adventure games.

SuMac I believe you have the Iphone version which is playable on the Ipad. As smulan posted, it really did just come out a few days ago. It was not previously offered. About the time you posted that you had it, is when the Iphone release took place.